When we sat down with the cast of the upcoming a cappella comedy "Pitch Perfect," we came with a reporter's notebook full of inquiries for stars Anna Kendrick, Brittany Snow, Anna Camp and Skylar Astin. And you better believe at the top of that list was: "What the f--- is a 'pitch slap?'"—that mysterious maneuver referenced in the movie's tagline.

While the cast mates couldn't agree on its precise definition (answers varied from acts of violence to Justin Timberlake's falsetto), they did address the question gamely and with aplomb worthy of the Barden University Bellas and Treblemakers.

Click play on the video above to get pitch slapped. Or something.

"Pitch Perfect" opens in limited release today, going wide October 5.

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